Block Data Object

I am trying to find an object in max which which analyses the data entering the object, and only lets the data exit, when the values change. I imagine i sound pretty dumb, as it sounds like a basic logical test.

The data entering said object would be 3 packed integers where only one of the integers is ever changing. I nheed to basically filter out repeat messages.

Thanks a lot guys. The zl change object got me thinking, but it didn’t seem to work, dunno if it was the way i was using it, so i just tried ‘change’ and used it earlier in the patch (before the data became a list) now it works perfectly. Thanks for all your help..
jb